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If the fan is on the same switch as the light people will turn the fan off before all the humidity can be exhausted. You also may not want the fan on just because you need light. I prefer single switches for each.

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Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.

If the fan is on the same switch as the light people will turn the fan off before all the humidity can be exhausted. You also may not want the fan on just because you need light. I prefer single switches for each.

I think you missed what the OP is saying. He wants separate controls for the fan and light, but I think he's saying he only has a single gang box.

The only thing I could find that matches what you describe is a dimmer/timer combo, which is costly, and won't work if you want to use CFL light bulbs.